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Which geologic period came before the Cretaceous Period?
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Cretaceous Period
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the late Cretaceous Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The geologic period that preceded the Cretaceous Period was the Jurassic Period.12
The Jurassic Period lasted from approximately 201.3 million to 145 million years ago, after which the Cretaceous Period began. Together with the Triassic Period, these three intervals constitute the Mesozoic Era.312